OhMyCalc

Ring Size Calculator

Convert finger circumference to US and EU ring sizes.

How to Use the Ring Size Calculator

  1. Enter the required values.
  2. Click Calculate to see the results.
  3. Review the output values.
  4. Adjust inputs as needed.

Référence rapide

DeVers
49 mm circUS 5 / EU 15.6
52 mmUS 6 / EU 16.5
54 mmUS 7 / EU 17.2
57 mmUS 8 / EU 18.1
60 mmUS 9 / EU 19.1
63 mmUS 10 / EU 20.1

Cas d'utilisation

Formule

Diameter = Circumference / π. US ≈ (Diameter − 11.63) / 0.8128.

Questions fréquemment posées

How to use?
Enter the data and click the calculate button.
Calculation accuracy?
Calculations are performed with high precision.
Is it free?
Yes, all calculators are completely free.